3,4-Dihydro-4-methyl-7-[(pentafluorophenoxy)carbonyl]-2H-pyrido[3,2-b][1,4]oxazinePerfluorophenyl 3,4-dihydro-4-methyl-2H-pyrido[3,2-b][1,4]oxazine-7-carboxylate 97%Pentafluorophenyl 3,4-dihydro-4-methyl-2H-pyrido[3,2-b][1,4]oxazine-7-carboxylatepentafluorophenyl 4-methyl-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazine-7-carboxylate